Description of problem: LightDM can't start with SELINUX=enforcing. "Permissive" or "Disabled" - ok. Version-Release number of selected component (if applicable): * Fedora 18 (i686) * lightdm-1.4.1-3.fc18.i686 * lightdm-razorqt-0.5.2-8.fc18.i686 (lightdm greeter) How reproducible: Steps to Reproduce: 1. yum install lightdm-razorqt 2. /etc/sysconfig/desktop: DISPLAYMANAGER=/usr/sbin/lightdm 3. /etc/selinux/config: SELINUX=enforcing 4. init 6 Additional info: Problem appeared during creating QtDesktop spin (http://fedoraproject.org/wiki/QtDesktop_Spin). After "yum remove selinux-policy" and install it again lightdm started ok. Now QtDesktop's *.ks contains "selinux --permissive".
For what it's worth, during testing, I set selinux in permissive to get lightdm with lightdm-razorqt greeter to start ok. But I couldnt find anything relevant in /var/log/audit/audit.log (nothing mentioning lightdm anyway).
Could it be tested with # semodule -DB re-test it and # ausearch -m avc,user_avc -ts recent |audit2allow
sealert finally showed me the denial, see bug #969090 *** This bug has been marked as a duplicate of bug 969090 ***